MESON Chess Problem Database

Problem Display
PID: 78291 (5NNB/8/3k4/K1Rq4/1P3n2/5B2/7b/3Q4 w - - 0 1)

Cheylan, Yves

The Problemist, 1976

5NNB/8/3k4/K1Rq4/1P3n2/5B2/7b/3Q4

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Be5#
      • 2.Rc6#
    • 1...Qd2
      • 2.Be5#
      • 2.Rc6#
    • 1...Qd3
      • 2.Be5#
      • 2.Rc6#
    • 1...Qd4
      • 2.Be5#
      • 2.Rc6#
    • 1...Se2
      • 2.Qxd5#
    • 1...Sg2
      • 2.Qxd5#
    • 1...Sh3
      • 2.Qxd5#
    • 1...Sh5
      • 2.Qxd5#
    • 1...Se6
      • 2.Qxd5#
    • 1...Sg6
      • 2.Qxd5#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Rc6#
      • 1...Qd4
        • 2.Be5#
      • 1...Sd3
        • 2.Rxd5#
      • 1...Bg1!
    • 1.Se7?
      • threat
        • 2.Sf5#
        • 2.Sc8#
      • 1...Sd3
        • 2.Sc8#
      • 1...Kxe7!
    • 1.Bxd5?
      • threat
        • 2.Rc6#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sd3!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Be5#
      • 1...Qxd4
        • 2.Rc6#
      • 1...Se2
        • 2.Qxd5#
      • 1...Sg2
        • 2.Qxd5#
      • 1...Sd3
        • 2.Qxd5#
      • 1...Sh3
        • 2.Qxd5#
      • 1...Sh5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qxd5#
      • 1...Sg6
        • 2.Qxd5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(A),XQ(c)
  • Tries
    • Try
      • K(D);N_SPINR(E),S_FLIGHT
      • Threat
        • R1(E)
      • Vars
        • Q(c);P_PINR(E)::B(H)
        • S(b);N_GUARD,N_SPINQ(c)::R1(E),XQ(c)
      • Refutation
        • B(a);P_PINR(E)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_SPINQ(c)::S(G)
      • Refutation
        • K(d);N_SPINQ(c),S_FLIGHT,XS(G)
    • Try
      • B(B);N_SPINR(E),XQ(c)
      • Threat
        • R1(E)
      • Vars
        • S(b);OGATE,P_SPINS(b),XB(B)::QAR1(A),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • B(H)
    • Vars
      • Q(c);N_PINR(E),N_SPINQ(c),XQ(A)::R1(E)
      • S(b);N_GUARD::QAR1(A),XQ(c)
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